<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<input type="text" id="i1" placeholder="姓名">
<input type="text" id="i2" placeholder="工资">
<input type="text" id="i3" placeholder="工作">
<input type="button" value="添加" onclick="f()">
<table border="1">
    <tr>
        <th>姓名</th>
        <th>工资</th>
        <th>工作</th>
    </tr>
</table>

<script>
    //大部分浏览器可以不写
    // let i1 = document.querySelector("#i1")
    // let i2 = document.querySelector("#i2")
    // let i3 = document.querySelector("#i3")
    //获取table
    let table = document.querySelector("table")
    function f(){
        //创建tr和td
        let tr = document.createElement("tr")
        let nameTd = document.createElement("td")
        let salaryTd = document.createElement("td")
        let jobTd = document.createElement("td")
        //把用户输入的内容添加到td里面
        nameTd.innerText = i1.value
        salaryTd.innerText = i2.value
        jobTd.innerText = i3.value
        //把td添加到tr中
        tr.append(nameTd,salaryTd,jobTd)
        //把tr添加到table中
        table.append(tr)

    }
</script>

</body>
</html>